# CVE-2017-5543: Subrion CMS PHP Object Injection

> Remote attackers can execute arbitrary code via PHP object injection in Subrion CMS by sending crafted serialized data in a login cookie.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Jan 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-4j79-4m6q-77vf

## What is CVE-2017-5543?

CVE-2017-5543 is a critical unsafe deserialization vulnerability in n/a, published on 20 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

includes/classes/ia.core.users.php in Subrion CMS 4.0.5 allows remote attackers to conduct PHP Object Injection attacks via crafted serialized data in a salt cookie in a login request.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2017-5543?

2 open source packages ship an affected version, including intelliants/subrion. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `intelliants/subrion` | Packagist | From 4.0.5 | 4.1.0 |
| `intelliants/subrion` | Packagist | From 4.0.5 | 4.1.0 |

Products: Intelliants Subrion.

## How do I fix CVE-2017-5543?

Upgrade intelliants/subrion to 4.1.0 or later.

## Is CVE-2017-5543 being exploited?

There is no known exploitation of CVE-2017-5543 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-25400](https://insights.sbomify.com/CVE-2024-25400/): SQL injection in n/a (critical 9.8)
- [CVE-2020-18155](https://insights.sbomify.com/CVE-2020-18155/): SQL Injection in Subrion CMS (critical 9.8)
- [CVE-2023-46947](https://insights.sbomify.com/CVE-2023-46947/): Subrion remote command execution vulnerability (high 8.8)
- [CVE-2018-21037](https://insights.sbomify.com/CVE-2018-21037/): Subrion CMS CSRF Vulnerability (high 8.8)
- [CVE-2017-15063](https://insights.sbomify.com/CVE-2017-15063/): Subrion CMS CSRF Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-5543 and fix it if it is affected.

What it is: CVE-2017-5543 is a critical unsafe deserialization vulnerability in n/a, published on 20 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-5543 in the wild and no public exploit code.

Affected packages and fixed versions:
- intelliants/subrion (Packagist): affected from 4.0.5; fixed in 4.1.0
- intelliants/subrion (Packagist): affected from 4.0.5; fixed in 4.1.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2017-5543/ (Markdown: https://insights.sbomify.com/CVE-2017-5543/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-5543
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-5543
- OSV: https://osv.dev/vulnerability/CVE-2017-5543

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-5543/
Summaries are generated and may contain mistakes; the official description above is the record.